import logging, re, json

def setup_logging():
    logging.basicConfig(level=logging.INFO, format="%(asctime)s - %(levelname)s - %(message)s")
    return logging.getLogger("smart-assistant")

def clean_text(t: str):
    return t.strip()

def validate_input(t: str):
    return bool(t and t.strip())

def parse_query_params(_t: str):
    return {}

def ResponseFormatter():
    pass  # 留空 – 如需结构化输出再补

def extract_json_from_text(txt: str):
    try:
        return json.loads(txt)
    except Exception:
        return None